chore: only use pyproject.toml

Author: uwzm

.github/workflows/python-app.yml

@@ -31,7 +31,7 @@ jobs:
         docker compose version
         python3 -m pip install --upgrade pip
         pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install -e .
 
     - name: Lint with flake8
       run: |